Fastening for threshing-machine teeth.



0,, WALLS GHLAEGER. I FASTENING FOR THRESHING' MAOHINB TEETH.

. APPLIOATION FILED JULY 6, 1 908.

- 2- 1 1 Patented June l, 1-909.

j, jnnrrnn STATES PATENT ci i ron OTTO WALLSCHLAEUER, 01* MILWAUKEE,WISCONSINQ FASTENING FOR THRESHING-MACHINE TEETH.

nttees ei.

To all whom rt may concern;

Be it known that I, ()T'ro vYALLsonLAn of fastening the inscrtiblc tootGER, of Milwaukee, \llisconsin, have invented a Fastening for'llhreslringdxlachinc Teeth, of whichthc following is a specification.

My invention relates to an. inmrovedinmle tor the cylinders and concavesof threshing-nlachincs.

. Up to the present time grout dilliculty has been experienced infinding n inc-tins for his toning thresher-teoth in position so securelyas toprevent them from working loose during operation and yet of suchcharacter that they may be easily removed and rcphtced. The general.iuenns in use has been screws or sdrew-threedcd devices. These are opento serious objections that they ire piently work loose even whenfurnished with lock'nuts, elastic washers and the'like,

.and that in the case of the cylinder-being:

; on the inner faces of the cylinder bars, they are dilllcult to get atwith a wrench and to screw up tight in place; and this especially truewhen the teeth, are set close together.

' In my invention I aim to provide/.8- fastening device whichshallentirely dispense with the use of screws and screw threads and whichmoreover shall have the characteristic.

that any loosencss or wnbbling 01' the'teeth shall have the ellect'ofdrawing them tighter I in place rather than allowing their! to becoinelooser. And l-furthcr his: to provide a lustening with the additionalvchm-actcl-istic that it can he set up and the teeth secured or removedn a. few moments and without the use of a wrench, tool, or specialdii'liculty of any kind.

vhined with a, spring acting to press or pull the'wedge up into place.In combination with these features, Where an open notch is used, I alsouse a special form of washer adapted to hold the wedge in place.

My invention consists further in the special constructions andcombinations which will be herein-after described and particularly setforth inmy claims. I

In the accompanying drawings I have Specification of Letters Patent.Application filed July 6, 1908. Serial No. 442,025.

which engages a wedge It.

Patented June 1, i909.

shown the most improved form. of my invention in'conncction withportions of a cylinder and concave of a tlmeshing-machine, and herein'liigurc 1 represents in tranverse section a part of a cylinder andconcave, the teeth of which are provided with my improved liastoning;Fig: 2 is a longitudinal section through one of the bars carrying theteeth, showing the tooth. and wedge in elevation: his. 3 is a.perspective of the washer, and Fig. lis a perspective of the wedge.

In these drnwin every reference letter rel'ers alive ys to the somepart.

Fig. lshows a common form of thresh'ercylinder 1: carrying bars 1) inwhich are set rows of teeth c, and a portion of a concave (1 having barsc also carrying rows of teeth 0. These elements may be of any pattern,style and shape, the latter forming no part of my invention. v

The shanks of the teeth 0 are provided with tapered shoulders 9, saidshanks fitting in sockets h in the bars I) and c which are preferztblyflared at the ends as at i, to fit the shoulders g. The ends of theshonksfprojec-t beyond the back side of the'bnrs Z) and c, and each.shank is provided with at recess j in The recess j may consistently withany invention be in the form of oslot anywhere in the bar, but 1 preforto make it iii-the form of an open-sided notch. in one sidcthereof, assuch 21, notch can be forged directly in the tooth instead of being cutout specially. In the case of such an open-sided notch or slot, I use a.washer ,m

hnving a central aperture it formed by turn- I mg up the metal to form atongue or abutment 0 thereof at right angles to the plan of the washer,said abutment lying against the openfnce of? the notch or slot 7' andholding the wedge 73 against lateral displacement.

The wedge is is held in place by means of-e spring 2) which is connectedwith the-small end of the wedge by a hole g therein, or a hook 1" asshown. in the case of the lower teeth, Fig. 1; said spring p beingconnected to the wedges of two adjacent teeth which are turned inopposite directions as shown, so thatthe effect of the spring is to drawthe two Wedges together, and to draw each wedge more tightly into lace.Ordinarily the rows of teeth in the cylinder and concave are even innumber, so that there will be a whole'nmnber of pairs of teeth-t0 beunited by the springs 31; but. in caseof anvuneven number of'rows, I mayfasten the springs p of the odd teeth to a fixedbaror like object 8. 4

While l prefer to use the spring 19 as shown 5 to connectgthe two wedgesit is not necessary thatthisform of spring or any form of s ring he usiasa simple' wire or any form 0 connection holding the two wedgestogether would serve the purpose consistently with invention, thoughless perfectly.

' ing; in combination with a tooth having a recess in'the shank thereof,a Wedge'fittmgin said recess and holding the tooth against 7 e. I' have'hereinabove shown the most. improved form of my invention, I wishitunderstoodi'that not all of the features are esas; ;i'a'l thereto ornecessarily madein the exact form shown, but. various changes andmodifications in'the constructions as herein isen eofmy claims. r

371.11g h rdfi libed my invention, what "claim as new and desire tosecure by Letters Patent is: v I r I I A fastening for thresher-teethcomprispulling out, and resilient means for pressing said wedge morefirmly into place. e I .2. Afastening for thresher-teeth comprising, incombination with a tooth having a re-' 'cess in the'shank thereof, awedge fitting in said recess and holding the teeth against pulling out,and a spring acting to draw said wedge more firmly into lace.

3.- In a threshing-mac line, a fastening for the teeth thereofcomprising, in combination With two adjacent teeth each having a trans.Vers'e recess in the shank thereof, two trans-- verse wedges fitting inthe respective recesses, and a spring connecting the two wedges. I

4. In a threshing-machine, a fastening for the teeth thereof comprising,in combination with two adjacent teeth each having a transverse recessin the shank thereof, two transverse wedges fitting in the respectiverecesses and having their small ends toward each other, and a connectionbetween small ends of the two wedges tending to draw them together in adirection lying across said recesses.

5. In athreshmg-m'achme, a fastening for shown may be made without dearting from 'he spirit of my invention, and -wish it 1111s ue st'oodtherefore that. the latter is not otherwise limited than by thereasonable the teeth thereof comrisin in combination with two adjacenttee l1 eac having a transverse 'recessin the shank thereof, two trans-verse wedges fitting in the respective, re-

cesses, and a tension-spring connecting the small ends .of the twowedges.

i 6. In a threshing-machine, means forfastening the teeth thereofcomprising, in combination witha tooth having an o en-sided recess inone side of the shank t ereof a transverse-wedge set in said recess andshd able parallel, tothe face of said recess to draw 'up the tooth,means for preventing-saidm wedge fromretracting', and an abutment facingtheiopen side of said recess and holding said wedge agag'j st'lateral'displacement.

7. In a-thres ing ma'chine, means for fastening the teeth thereofcomprising, incombination with a'to'othjh'aving an o en-sided recess inone .sideof'thefsh'ank t ereoffa' transverse wedge setin said recess,means for preventing said wedge from retractin'g, .and a washer havingan aperture" through 1. which said shank passes andfanu'pright tongueat-v one side .of-said aperture forminganabut1' ment lying against theopen; face of saidire cess.. i

8. Inga threshing-machine, means for fastening the teeththereofcomprising, in combination with-a tooth having an o ten-sided recessinone side ofithe shankv t ereof, a

washer through which said shank passes pro- .vided with an uprighttongue subte'ndin'gthe open side'of said recess a transverse wedgef-fitting in said recess, and a spring acting on said wedge to press itm ore ti tly into place.

combination, a pair of adjacent teeth. each having an open-sidedrecessin one side of the reshing mac ine,- fasteningmeans for the teeththereof comprising, in

